[PATCH 08/11] cpufreq: imx: Use 'index' only to index into policy->freq_table

From: Viresh Kumar
Date: Thu Jun 02 2016 - 10:21:46 EST


Later patches would make changes in cpufreq core, after which
policy->freq_table may be reordered by cpufreq core and it wouldn't be
safe anymore to use 'index' for any other local arrays.

To prepare for that, use policy->freq_table[index].driver_data for other
driver specific usage of 'index'. The 'driver_data' fields are already
set properly by the driver.

Cc: Shawn Guo <shawn.guo@xxxxxxxxxxxxx>
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
---
drivers/cpufreq/imx6q-cpufreq.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c
index 3858dc7e617b..e7da85890e8c 100644
--- a/drivers/cpufreq/imx6q-cpufreq.c
+++ b/drivers/cpufreq/imx6q-cpufreq.c
@@ -42,14 +42,21 @@ static unsigned int transition_latency;
static u32 *imx6_soc_volt;
static u32 soc_opp_count;

-static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int index)
+static int imx6q_set_target(struct cpufreq_policy *policy, unsigned int pindex)
{
struct dev_pm_opp *opp;
unsigned long freq_hz, volt, volt_old;
- unsigned int old_freq, new_freq;
+ unsigned int old_freq, new_freq, index;
int ret;

- new_freq = policy->freq_table[index].frequency;
+ new_freq = policy->freq_table[pindex].frequency;
+
+ /*
+ * policy->freq_table may be sorted differently, get the index value we
+ * are concerned about.
+ */
+ index = policy->freq_table[pindex].driver_data;
+
freq_hz = new_freq * 1000;
old_freq = clk_get_rate(arm_clk) / 1000;

--
2.7.1.410.g6faf27b